Strength and bond characteristic of UHPC pastes with quaternary binders

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Abstract

In the present research, UHPC pastes are designed with quaternary binders, namely Portland cement, slag cement with 50% of ground granulated blast slag, limestone powder and micro/nano silica, at a relatively low water-to-powder ratio of 0.2. The compressive strengths
of UHPC pastes are measured and analysed after the curing age of 28 days and 56 days, respectively. The fibre-to-matrix bonding properties of UHPC pastes are characterized after 56 days. The results show that it is possible to use those quaternary binders system to design UHPC
matrix with compressive strength ranging between about 140 MPa and 180 MPa at a relatively low water content. Slag and limestone powder can greatly improve the sustainability without sacrificing too much strength and fibre-to-matrix bonding force of UHPC pastes. 5% micro silica contributes to higher compressive strength of UHPC pastes containing Portland cement, while 3% nano silica has higher efficiency than 5% micro silica for mixtures with slag cement.
Original languageEnglish
Title of host publicationProceedings of the 2nd International Conference on UHPC Materials and Structures UHPC 2018 - China
Place of PublicationChonging
PublisherRILEM Publications
Pages337-343
Number of pages7
Publication statusPublished - 7 Nov 2018
Event2nd International Conference on UHPC Materials and Structures - Fuzhou, China
Duration: 7 Nov 201810 Nov 2018

Conference

Conference2nd International Conference on UHPC Materials and Structures
CountryChina
CityFuzhou
Period7/11/1810/11/18

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